Copying my reddit comment here for visibility.
"Hey Pharases, keep up the great work.
I checked and I too don't have a 'platform' folder in my Titanfall folder?
Could it be that installations BEFORE April 10th installed these folders and files even for DX10 users but installations AFTER April 10th don't include them for DX10 users. This would explain why people with DX10 who installed previous to April 10th can still play even now but DX10 users who've installed since April 10th can't."
There are other people with DX10 cards who've installed before April 10th and they have 2.18 Gb in 6 files in the folder that Pharases posted and the game runs for them. If you have a DX10 card, installed after April 10th and are crashing in the private lobby 100% of the time check the folders below; If you are missing a platform folder then that's the problem and we need Respawn to fix it. Hopefully the patch today addresses it.
C:\Program Files (x86)\Origin Games\Titanfall\platform\shaders\fxc